Open AccessPerformance of various quantum-key-distribution systems using 1.55 μm up-conversion single-photon detector
Author(s) -
焦荣珍,
冯晨旭,
马海强
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1352
Subject(s) - quantum key distribution , detector , physics , keying , photon , differential phase , quantum cryptography , key (lock) , quantum , optics , quantum information science , optoelectronics , computer science , quantum information , telecommunications , quantum mechanics , quantum entanglement , computer security
The performance of various quantum-key-distribution (QKD) systems is analyzed using 1.55 μm up-conversion single-photon detector. The dependence of quantum efficiency and dark count rate change on the pump power was also discussed. The comparison is based on the secure communication rate as a function of distance for three QKD protocols: the Bennett-Brassard 1984, the Bennett-Brassard-Mermin 1992, and the coherent differential-phase-shift keying protocols. We show that the up-conversion detector allows for higher communication rate and longer communication distance than the commonly used InGaAs/InP APD for all three QKD protocols, and the properties of quantum key distribution system can be greatly improved by this detector.